- Reactions of (η6-Arene)tricarbonylchromium Complexes: Hydrogenation, Nitration, and Bromination
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In this study, we explore the reactions of coordinated arenes, e.g., hydrogenation, nitration, and bromination, to prepare compounds which are not accessible from conventional organic synthesis. The reaction products formed from reactions with the coordinated and the uncoordinated arenes are compared. The polycyclic aromatic hydrocarbons (PAHs) employed for this study include phenanthrene, methyl- and acetyl-phenanthrene, and benz[a]anthracene (BA). The tricarbonylchromium group demonstrated various characteristics which influence the reactions in this work, such as an electronic effect to deactivate hydrogenation, a steric effect to exhibit highly positional selective nitration, and a free radical mechanism to direct bromine to attack at the ring coordinated to tricarbonylchromium.
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- Characterization of Nitrobenzanthracenes and Nitrodibenzanthracenes
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Nitration of benzanthracene, dibenzanthracene, and dibenzanthracene, using nitric acid in acetic anhydride, gave mainly isomeric mixtures of corresponding mononitro derivatives.The derivatives were purified by HPLC on silica to a purity of better than 99.5 percent and indentified on the basis of their 1H NMR, MS and UV data.The main isomers were 7- and 12-nitrobenzanthracene, 9-nitrodibenzanthracene, and 5- and 7-nitrodibenzanthracene.
- Iversen, Berit,Sydnes, Leiv K.,Greibrokk, Tyge
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p. 837 - 848
(2007/10/02)
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